Question

Which relation is a function?

A. (3, 5), (4, -1), (-1, 8), (2, -1), (8, 7), (9, 2)

B. (2, 5), (4, 3), (-1, 8), (2, -1), (6, 7), (1, 2)

C. (-5, 5), (-3, -1), (-3, 8), (-3, -1), (4, 1), (3, 2)


D. (3, -2), (4, -2), (5, 8), (7, -8), (5, 7), (0, -4)

Answer 1

A

Explanation:

In a function, the X values cannot repeat numbers, but Y values can

In B, the number 2 repeats

In C, the number -3 repeats

In D, the number 5 repeats